Pneumatic carpet-renovator.



No. 800,292. PATENTED SEPT. 26, 1905;

. c. GUNDERSON. PNEUMATIC CARPET RENOVATOR.

APPLICATION FILED APR. 1a, 1903.

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No. 800,292. PATENTED SEPT. 2 1905'.

c. GUNDBRSON.

PNEUMATIC CARPET REN0VAT0R APPLIGATION rum) APR. 1a. 1903.

2 'BEEETS-SHEBT 2.

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A TTORNE Y6,

CARL GUNDERSON, ()F MILWAUKEE, WISCONSIN.-

PNEUMATIC QARPET-RENQVATOFI.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed April 13, 1903. Serial No. 152,229.

To all whom it may concern.-

Be it known that I, CARL GUNDERsoN, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of .Wisconsin,have invented new and useful Improvemen ts in Pneumatic(Jarpet-Renovators, of which the following is a specification.

My invention relates to improvements in combined pneumaticcarpet-renovators and dust-collectors; and it pertains more especially,first, to the air-actuated brush mechanism by which the'carpet isbrushed and the dust loosened in advance of the dust-collector; second,to the suction mechanism by which the dust isdrawn from the carpet anddriven into a dust-receptacle; third, to the construction of thedust-receptacle, by which the current of dust-laden air is caused toflow in a continuous circular course within and around such receptacleuntil its force is spent and the dust is permitted to settle before itescapes,

whereby the dust-receiving sacks or screens The construction ofmyinvention is further I explained by reference to the accompanyingdrawings, in which Figure 1 represents a front View thereof. Fig. 2 is aside view, and Fig. 3 is a horizontal section drawn on line 00 w of Fig.2.

Like parts areidentified by the same reference-letters throughout theseveral views.

A represents the dust-receptacles into which the dust is forced by acurrent of air under pressure, which is led to the machine through theduct B, which duct B is connected with an air-compressor by flexibletubes'in the ordinary manner. same is moved backward andforward over thesurface of the carpet by the operator,'while the lower end of thedust-receiving chamber C rests upon the carpet or other surface to becleaned.

The upper end her 0 is connected with the several receptacles A throughthe chamber D, duct E, and branch ducts or passages F F Grand H H. Thedu'ct B is provided with a conical-shaped discharge end I, through whichthe air is caused to es-' cape in the jet or current against the apex ofthe conical-shaped shell J, whereby a partial of ordinary construction.

In operating thedevice the of the dust-receiving charn-' drawn from thecarpet or other surface and discharged into the dust-receptacles A.

The passages F and H, through which the air enters the receptacles A,are formed at a tangent to the verticalwalls thereof, whereby as thecurrent of air strikes the opposing wall it is given a circular course,as indicated by the arrows, and continues to revolve therein until itsforce is spent, when it escapes from the upper and lower ends of saidreceptacles through the passages L, while the dustthatis conveyed tosaid receptacle falls of its own I gravity into the chambers M, locatedat the lower, end of said dust-receptacles. The chambers M are connectedwith the receptacles A by the closely-fitting annular flanges N, andsaid chambers M may be readily removed therefrom for the purpose ofdischarging the accumulation of dust therefrom.

O is a reservoir for water, gasolene, or other similar liquid, which isadapted to discharge its contents. on a sheet of screen-cloth P throughthe discharge-duct Q, the discharge of such liquid being regulated bythe valve R The liquid thus discharged on the screen-cloth is adapted tobe vaporized by a current of air which is'conducted thereto from theair-pipe S through the duct T, whereby the dust is dampened and causedto settle more readily; A similar liquid-reservoir A is connected withthe airtube B near its discharge end, and the discharge of liquidtherefrom is regulated by a controlling-valve B of ordinaryconstruction. The device thus far described is operative for removingdust from carpets and similar surfaces by pneumatic pressure; but thesameis made more eflicient by the application of the brush C, which isoperated as hereinafter described. The brush 0 is supportedat itsrespective ends from the chamber C by the springs E, said springs beingconnected at one end to said chamber 0 by the bars a and at theiropposite ends to the ends of said brush by screws 7). The brush C isgiven.

a rapid reciprocating motion by the piston D. The piston D is driventoward the right by pneumatic pressure and toward the left by the actionof the spring E. The

bar E' and is adjusted so as to act with greater or less force againstthe piston by the hand-screw F, which hand-screw isalso supported fromthe case 0 by the screw supporting bearing G. The brush 0 is connectedwith the piston D through the bracket H spring E is supported from thecase G by the IIO and bolt 1, one end of which bolt is rigidly aflixedto said piston and the other operates in a slot J, formed in saidbracket H. Air is conducted to the cylinder J, in which said pistonoperates, through the pipe S and duct K. The piston D is provided with aradial duct L, which communicates with the interior of the cylinder Jthrough the central duct M. whereby the piston D is driven toward theright against the spring E until the duct L is thrown out ofcommunication with the duct K, when the air therein acting expansivelymoves said piston past the outlet-port N, when the air escapes from thecylinder and permits said piston to be thrown back to its formerposition by the action of the spring E, whereby the air ducts or ports Kand L are again thrown into registry with each other and the air againpermitted to enter said cylinder, when the action of the piston is againand continuously repeated. Thus the piston with the brush C connectedtherewith are caused to vibrate rapidly as the machine is moved forwardover the carpet. When, however, the machine is drawn rearwardly, saidbrush C is tilted forward by contact with the carpet to the positionindicated by dotted lines in Fig. 2, whereby the piston D, which isconnected with said brush, is turned a partial revolution on its axis,and said ducts or ports K and L are thereby thrown out of registry witheach other and the air is excluded from said cylinder during thebackward movement of the device. When, however, the device is movedforward, said brush is again brought to the vertical position,(indicated in Fig. 2,) whereby said piston is brought back to its formerposition, in which the aircontrolling valves are caused again toregister with each other, whereby said brush is again actuated. Thus itwill be understood that with each rearward movement of the machine uponthe carpet or other surface the brush is permitted to remain at rest,while with the forward movement it iscaused to reciprocate,

as stated, whereby the dust in the carpet or other surface is loosenedimn'iediately in advance of the receiving-chambcr when by the action ofthe air it is drawn, as stated, into the dust-receptacles. It will ofcourse be understood that the device thus shown and described isprovided with a suitable operating-handle substantially like that of anordinary carpet-sweeper, by which the operator is enabled to move itbackward and forward over the surface to be cleaned. it will also beunderstood that, if desired, the reciprocating brush may be disengagedfrom the dustcollector and the same operated like the pneumaticdust-collectors of ordinary construct ion.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent is- In a carpet-renovater, the combination of ad ust-receiving chamber; a reciprocating brush adapted to loosen thedust in a carpet preparatory to entering said chamber; means fordelivering the dust to said chamber; a pneumatic motor comprisingacylinder; a piston; means for communicating motion from the piston insaid cylinder to said reciprocating brush and means for conducting airunder pressure from the source of supply to said motor, substantially asset forth.

In testimony whereof I a liix my signature in the presence of twowitnesses.

' CARL GUNDICRHON. VVitn esses:

JAs. B. ERWIN, C. L. Ronson.

